This modular vintage mixer from Altec Lansing includes various parts, such as 14799a, 1576a, 14800a, and 1581a. Includes original Altec chassis. These parts are perfect for those who want to restore their vintage audio equipment. The brand, model, and type are all Altec Lansing, indicating that these parts are authentic and reliable. These parts can be used to enhance the performance of vintage amplifiers and tube amps as well as other consumer electronics. Turns on but no way to test. No knobs or any other parts available. Over a thousand, 100% positive feedbacks. Check out what they say online: a typical package is subjected to but do not recommend dropping it to test this out.